Component Mounting Device Linear Motor Head Unit Design
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Solution Overview
Problem
Conventional component mounting devices face challenges in narrowing the pitch of nozzle member arrangement or reducing the size of the head unit while achieving higher nozzle member driving speeds due to the limited drive force of coreless linear motors.
Innovation Solution
The component mounting device employs a cored linear motor configuration with a stationary element having a comb-shaped core and a coil, and a mobile element with permanent magnets, allowing for increased thrust and compact design, enabling vertical nozzle movement at higher speeds with a narrow pitch arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If a coreless linear motor is used to vertically drive the nozzle member, then the space occupied by the driving mechanism is reduced and the pitch of nozzle member arrangement can be narrowed, but the generated drive force becomes relatively small, preventing higher speed operation
Solution Approach 1:
The linear motor is divided into two separate units: a first linear motor for driving front-row nozzle members and a second linear motor for driving rear-row nozzle members. This segmentation allows each motor to be optimized independently, with the first motor using a coreless design for compactness and the second motor providing additional drive force, thereby resolving the contradiction between reduced space and sufficient drive force.
Solution Approach 2:
Two linear motors are combined to drive the nozzle members vertically - a coreless first linear motor and a cored second linear motor. This merging allows the system to benefit from both the compact size of the coreless motor and the high force output of the cored motor, achieving both space reduction and sufficient drive force for high-speed operation.
2Productivity
If the armature size is increased to generate higher drive force for faster nozzle member operation, then the mounting efficiency can be improved, but the size of the head unit increases, hindering narrowing of nozzle member pitch
Solution Approach 1:
The driving system is segmented into two independent linear motor units, allowing the drive force requirements to be distributed. The coreless first linear motor handles basic positioning with compact size, while the second linear motor supplements the drive force, enabling high-speed operation without increasing the overall head unit size.
Solution Approach 2:
The invention changes the configuration parameter of the linear motor from a single coreless design to a dual-motor system with different core configurations. This parameter change allows the system to achieve higher effective drive force through combined operation while maintaining compact dimensions suitable for high-density nozzle arrangement.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for higher-speed vertical driving of nozzle members with a compact design, effectively reducing the pitch of nozzle arrangements and the size of the head unit, enhancing mounting efficiency and precision while preventing thermal deformation.
Implementation Method 1
a first linear motor that vertically drives the nozzle members of the first nozzle array, and a second linear motor that vertically drives the nozzle members of the second nozzle array, each including a linear motor main body and a frame member that supports the linear motor main body, the linear motor main body including a stationary element fixed to the frame member and a mobile element that faces the stationary element in the second direction and that is movable in a vertical direction with respect to the stationary element
Implementation Method 2
the stationary element being an armature provided with a core that is aligned in the vertical direction and that has a plurality of teeth each in the second direction, and a coil fitted to each of the respective teeth of the core, the mobile element being a field element having a plurality of permanent magnets arranged in the vertical direction
Data Source
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AI summary
A component mounting device is provided with a head unit having a first nozzle array including a plurality of nozzle members aligned in a first direction, a second nozzle array that includes a plurality of nozzle members aligned in the first direction and that is aligned in a second direction orthogonal to the first direction with respect to the first nozzle array, a first linear motor that vertically drives the nozzle members of the first nozzle array, and a second linear motor that vertically drives the nozzle members of the second nozzle array. Each linear motor includes a linear motor main body and a frame member. The linear motor main body includes a stationary element and a mobile element that faces the stationary element in the second direction and that is movable in a vertical direction. The stationary element is an armature, the mobile element is a field element, and each of the nozzle members is coupled to the mobile element. The first linear motor and the second linear motor are disposed such that the mobile element of the first linear motor and the mobile element of the second linear motor are in close proximity with each other in the second direction and each stationary element is located outside the mobile element.